NPBI In Duct Air Purifier for Smell and Viruses

The NPBI In-Duct Air Purifier for Smell, Viruses and Smoke.

is an auto-cleaning needlepoint bipolar ionisation system.  The design’s weathertight seals allow for  internal and external duct mounting, handling up to 4,800 CFM or 12 tons. This product has been tested against actual SARS COV2 pathogen that causes COVID-19 providing a 99.9% inactivation rate. The NPBI In-Duct is not simply an air purifier, this innovative product eliminates 99.9% of bacteria and harmful particles in the air creating a healthier environment for all.  It is auto-cleaning and  lightweight, and is completely maintenance-free. If you are interested in other air purifier options please check out our Clenzair product range here.

Benefits of NPBI In Duct - Air Purifier For Smell, Viruses and Smoke

It also features: Universal voltage input, integral display, programmable cleaning cycle, integral alarm contacts, carbon fibre brush emitters, 3/4 quick-turn Duct adapter, 6-foot watertight flexible conduit

Input Voltage: 24VAC to 240VAC
Power: 12 Watts
Frequency: 50/60HZ
Total Ion Output: >400M ions/cc/sec
Airflow Capacity: 4,800 CFM or up to 12 tons
Temperature/Humidity: -20° to 140°F / 0 – 100% RH
Unit Dimensions/Weight: 3.75” Dia. x 7”L / 2.31 lbs
Electric Approvals: UL, cUL, CE
Alarm Contact Rating: 250VAC / 1 A
Compliance & Certifications: UL 867, OSHPD Seismic (OSP), IAQP, UL2998


The NPBI in duct is an air purifier for smell, viruses, bacteria and smoke. It has airflow circulation fan with integrated Needlepoint Bipolar Ionization (NBPI) System. The technology works by emitting both positive (H+) and negative (O2-) ions. Ions surround harmful pathogens and react as Hydroxyl (OH) radicals. This process removes hydrogen from the cell walls of microbes, inactivating harmful pathogens at a cellular level. In turn eliminating over 99.9% of bacteria, mould and viruses present in crowded but also domestic environments. It can be used in a variety of sectors and settings, creating the ideal conditions for the wellbeing of the people.
It has also been tested against SARS COV2 pathogen with a proven 99.9% inactivation rate (4 log kill).


The NPBI creates safer environments for all –  this air purifier for smell eliminates odours and mould and neutralising bacteria and viruses this dramatically reduces the risk of getting sick, and also eliminates the risks of sick building syndrome. It provides people with the peace of mind they are in a safe environment. The NPBI In Duct is also useful for people suffering with  asthma  and allergies, delivering relief from harmful particles found in the air. 

The NBPI In-Duct system is designed for indoor and outdoor use and can be installed in any size of air handling equipment. 

Clenzair Particle Reduction

Particle Reduction

The innovative design of the NPBI, ensures indoor air is purified by eliminating toxic particles and harmful bacteria, creating a safer, more protective environment

Clenzair Pathogen Reduction

Pathogen Reduction

During the ionisation process, ions dispersed by the unit disrupt pathogens found in the air by disrupting their surface proteins meaning they become inactive and no longer harmful

Clenzair Neutralise Odours

Neutralised Odours

The NPBI doesn’t just target harmful toxins and bacteria found in the air, it is also rids your environment of odours. The ions break down odours from chemicals, pets , cooking and other odours, transforming them into harmless compounds

Clenzair Energy Saving

Energy Saving

The technology reduces the amount of the air required from outside to keep indoor spaces clean and fresh, therefore lowering energy consumption, saving users on average 30% on their annual energy bills